<template>
  <div>
     <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" >添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->

        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom' , i1 === 0 ? 'bdtop' : '' ,'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for渲染二级权限 -->
                <!-- eslint-disable  -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
          <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
     <!-- 添加角色对话框 -->
     <!--  -->
     <!-- 分配权限对话框 -->
     <el-dialog
    title="分配权限"
    :visible.sync="setRightDialogVisible"
    width="50%"
    @close="setRightDialogClosed()"
    >
    <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
   </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中
      defKeys: [],
      // 获得id
      rolesId: 0
    }
  },
  computed: {},
  watch: {},
  created () {
    this.getRolesList()
  },
  methods: {
    /* 发起角色列表数据请求 */
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取失败')
      this.rolesList = res.data
    },
    // 删除ID对应的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      role.children = res.data
    },
    async showSetRightDialog (roles) {
      this.rolesId = roles.id
      // 获取所有的权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限列表失败')
      // 把获取到的数据保存到 data 中
      this.rightsList = res.data
      console.log(roles)
      // 调用
      this.getLeafKeys(roles, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归形式，获取角色下所有三级权限的id，并保存到 defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前是node 节点不包含children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 重新获取id
    setRightDialogClosed () {
      this.defKeys = []
    },
    //
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedNodes()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.rolesId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.getRolesList()
      this.$message.success('分配权限成功')
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin:7px
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter  {
  display: flex;
  align-items: center;
}
</style>
